Buying guide · Updated September 2026

The Best Protein Powder of 2026

We scored 13 protein powder products on efficacy, purity, value, experience and transparency — then read the labels, checked the certifications and watched the creator reviews so you don’t have to. Here’s how they rank.

Independent rankings — brands can’t pay for placement. How we score

Our picks at a glance

1
Best OverallTransparent Labs 100% Grass-Fed Whey Protein Isolate8.8
2
Best Taste & ExperienceOptimum Nutrition Gold Standard 100% Whey8.7
3
DymatizeDymatize ISO100 Hydrolyzed Whey Protein Isolate8.7
4
Most ViralLegion Whey+ Grass-Fed Whey Protein Isolate8.3
5
Best ValueOptimum Nutrition Gold Standard 100% Casein8.1
6
Best for Tested AthletesVega Performance Protein + Recovery (formerly Vega Sport Premium Protein)8.1
7
Garden of LifeGarden of Life Sport Organic Plant-Based Protein8.1
8
MyproteinMyprotein Clear Whey Isolate8.0
9
MomentousMomentous Grass-Fed Whey Protein Isolate7.9
10
Naked NutritionNaked Nutrition Naked Whey Grass-Fed Whey Protein (Unflavored)7.9

1Best OverallProtein Powder

Transparent Labs

100% Grass-Fed Whey Protein Isolate

8.8

Excellent

For shoppers who prioritize ingredient transparency and third-party verification, this is one of the strongest whey isolates available: 28 g of protein, a short stevia-sweetened ingredient list, NSF Certified for Sport status and public batch testing. The trade-off is price, at more than $2 per serving, and stevia's flavor will not suit everyone.

NSF Certified for SportInformed Choice

Why we like it

28 g of protein per scoop from grass-fed whey isolate
Listed in NSF's Certified for Sport database and certified by Informed Choice (per the brand)
Every ingredient disclosed by weight, with batch test results published online

Keep in mind

About $2.17 per serving for the 30-serving tub, well above whey blends
Stevia can leave an aftertaste some people dislike

Check price on Amazon Buy from the brand$64.99

We may earn a commission when you buy through these links — it never affects our scores. How we make money

Full review

2Best Taste & ExperienceProtein Powder

Optimum Nutrition

Gold Standard 100% Whey

8.7

Excellent

Gold Standard 100% Whey remains a default recommendation for good reason: a lean 24 g protein dose, banned-substance certification, and taste and mixability endorsed across about 100,000 buyer ratings. It is no longer a bargain, and the concentrate and artificial sweetener will not suit everyone, but few powders balance quality, variety and availability this well.

Informed Choice

Why we like it

24 g of protein in a 120-calorie, 31 g scoop (about 77% protein by weight)
Informed Choice certified and regularly tested for banned substances
More than 20 flavors on the brand's US store, with consistently strong feedback on taste and mixability

Keep in mind

Sweetened with acesulfame potassium and uses artificial flavors
Contains whey concentrate, and a share of buyers report digestive discomfort

Check price on Amazon Shop on TikTok Shop10.8K+ sold

We may earn a commission when you buy through these links — it never affects our scores. How we make money

Full review

3Protein Powder

Dymatize

ISO100 Hydrolyzed Whey Protein Isolate

8.7

Excellent

ISO100 is one of the most complete whey isolates you can buy: 25 g of protein per scoop with a published amino acid profile, minimal carbs and fat, and banned-substance certification. You pay a premium over whey blends, and the hydrolyzed angle is more marketing than proven performance edge, but for a lean, well-tested isolate that mixes easily it is a safe pick.

Informed Choice

Why we like it

25 g of protein and about 2.7 g of leucine per 120-calorie scoop, all from whey isolate
Informed Choice banned-substance mark on the label
Only 2 g of carbohydrate and 1 g of sugar in Gourmet Chocolate

Keep in mind

About $1.55 per serving for the 5 lb tub, pricier than whey blends
Contains soy lecithin and is sweetened with sucralose (plus stevia in the current formula)

Check price on Amazon Buy from the brand

We may earn a commission when you buy through these links — it never affects our scores. How we make money

Full review

4Most ViralProtein Powder

Legion

Whey+ Grass-Fed Whey Protein Isolate

8.3

Good

Legion Whey+ is one of the most credible naturally sweetened whey isolates, pairing certified grass-fed sourcing with public lab testing. You get slightly less protein per scoop than some rivals and pay a premium, but for buyers avoiding artificial sweeteners who want proof of what is in the bag, it is an easy recommendation.

NSF Contents CertifiedThird-party testedNon-GMO Project Verified

Why we like it

Whey isolate certified under the Truly Grass Fed program
NSF contents-certified (Dutch Chocolate and French Vanilla) and Labdoor-certified, with certificates of analysis linked online
No artificial sweeteners or dyes, and no added sugar

Keep in mind

21 to 23 g of protein per scoop, a little below leading isolates
About $2.06 per serving, with a higher list price on the brand site

Check price on Amazon Shop on TikTok Shop7.6K+ sold

We may earn a commission when you buy through these links — it never affects our scores. How we make money

Full review

5Best ValueProtein Powder

Optimum Nutrition

Gold Standard 100% Casein

8.1

Good

Gold Standard 100% Casein is a dependable, well-priced micellar casein for nighttime or between-meal protein, with good flavor and a filling texture. It lacks the named third-party certification of ON's whey and uses artificial sweeteners, but for most people who want a slow-digesting shake it does the job at a fair price.

Why we like it

24 g of micellar casein protein per 120-calorie scoop
Adds 500 mg of calcium and 100% of the Daily Value for zinc
About $1.40 per serving, good value for casein

Keep in mind

Not listed among ON's Informed Choice-certified products
Sweetened with both acesulfame potassium and sucralose, plus artificial flavor

Check price on Amazon Shop on TikTok Shop62+ sold

We may earn a commission when you buy through these links — it never affects our scores. How we make money

Full review

6Best for Tested AthletesProtein Powder

Vega

Performance Protein + Recovery (formerly Vega Sport Premium Protein)

8.1

Good

Vega Performance Protein + Recovery is a strong, sport-certified plant protein with a whey-like 30 g dose and solid leucine content. Texture and price hold it back, but for vegan athletes who need NSF certification it remains one of the best options, especially when bought at a discount.

NSF Certified for Sport

Why we like it

30 g of protein and 2.6 g of leucine per scoop
NSF Certified for Sport
Tart cherry and probiotic amounts are fully disclosed on the label

Keep in mind

Grainy or clumpy texture and a thicker consistency are common complaints
490 mg of sodium per scoop

Check price on Amazon Buy from the brand

We may earn a commission when you buy through these links — it never affects our scores. How we make money

Full review

7Protein Powder

Garden of Life

Sport Organic Plant-Based Protein

8.1

Good

For vegan or dairy-free athletes who need certified sport nutrition, this is the plant protein to beat: 30 g of protein per serving, solid leucine and four third-party certifications. Its flavor and texture are divisive, so buy a single tub before committing to a subscription.

NSF Certified for SportUSDA OrganicNon-GMO Project VerifiedCertified Gluten-Free

Why we like it

30 g of protein and about 2.5 g of leucine per serving, high for a plant protein
NSF Certified for Sport, USDA Organic, Non-GMO Project Verified and NSF gluten-free certified
Vegan and made without dairy or soy ingredients

Keep in mind

Taste and texture are divisive; reviewers mention chalkiness, foam and a stevia aftertaste
Recovery blend amounts are not disclosed

Check price on Amazon Buy from the brand

We may earn a commission when you buy through these links — it never affects our scores. How we make money

Full review

8Protein Powder

Myprotein

Clear Whey Isolate

8.0

Good

Clear Whey Isolate is a smart option if milky shakes put you off: 20 g of certified whey protein in a light, juice-style drink for about 80 calories. Expect some foam and a learning curve with mixing, and sample flavors before buying the large tub, since taste reviews are genuinely split.

Informed Choice

Why we like it

20 g of protein for 80 calories with zero sugar and fat
Informed Choice certified and verified under Informed Protein, per the brand
Light, juice-like texture that many find easier to drink than milky shakes

Keep in mind

Heavy foaming and slow dissolving are common complaints
Flavor reviews are split, with some finding it too sweet or medicinal

Check price on Amazon Shop on TikTok Shop1.8K+ sold

We may earn a commission when you buy through these links — it never affects our scores. How we make money

Full review

9Protein Powder

Momentous

Grass-Fed Whey Protein Isolate

7.9

Good

Momentous whey is a top pick for athletes who need certainty: NSF Certified for Sport status, lot-by-lot testing and a minimalist, gum-free formula built on grass-fed isolate. You pay heavily for that assurance and get only 20 g of protein per scoop, so value-focused lifters will find better deals elsewhere.

NSF Certified for Sport

Why we like it

NSF Certified for Sport, with lot-level testing and published certificates of analysis
Grass-fed European whey isolate with no gums, fillers or artificial sweeteners
Only 90 calories per 20 g protein serving

Keep in mind

About $2.40 per serving (roughly 12 cents per gram of protein) before subscription discounts
20 g of protein per scoop is lower than most competitors

Check price on Amazon Buy from the brand$59.99

We may earn a commission when you buy through these links — it never affects our scores. How we make money

Full review

10Protein Powder

Front of Naked Whey unflavored grass-fed whey protein 5 lb tub

Naked Nutrition

Naked Whey Grass-Fed Whey Protein (Unflavored)

7.9

Good

Naked Whey is the simplest way to add whey to your diet: one ingredient, 25 g of protein per serving and a fair price for grass-fed sourcing. It tastes plain on its own and its NSF certification could not be confirmed in NSF's public database, so it suits blenders and bakers better than athletes who need verified testing.

Why we like it

Single ingredient: grass-fed whey protein concentrate with no sweeteners or additives
25 g of protein and 5.9 g of naturally occurring BCAAs per 30 g serving
Versatile in recipes because it has no flavor or sweetener

Keep in mind

Bland, milky taste on its own; most people blend it with other ingredients
Clumping and foaming are common complaints without a blender

Check price on Amazon Shop on TikTok Shop49+ sold

We may earn a commission when you buy through these links — it never affects our scores. How we make money

Full review

Side-by-side comparison

Product	Score	Efficacy	Quality & Purity	Value	Experience	Transparency	Form
Transparent Labs 100% Grass-Fed Whey Protein Isolate	8.8	9.1	9.4	7.4	8.6	9.5	Powder
Optimum Nutrition Gold Standard 100% Whey	8.7	8.8	9.0	8.3	9.0	8.0	Powder
Dymatize ISO100 Hydrolyzed Whey Protein Isolate	8.7	9.0	9.0	8.0	8.9	8.5	Powder
Legion Whey+ Grass-Fed Whey Protein Isolate	8.3	8.4	8.9	7.0	8.0	9.2	Powder
Optimum Nutrition Gold Standard 100% Casein	8.1	8.3	7.4	8.6	8.5	7.8	Powder
Vega Performance Protein + Recovery (formerly Vega Sport Premium Protein)	8.1	8.6	8.9	7.0	7.2	8.0	Powder
Garden of Life Sport Organic Plant-Based Protein	8.1	8.5	9.0	8.2	6.9	6.0	Powder
Myprotein Clear Whey Isolate	8.0	8.2	8.8	8.2	6.8	7.0	Powder
Momentous Grass-Fed Whey Protein Isolate	7.9	8.3	9.5	6.2	8.0	6.0	Powder
Naked Nutrition Naked Whey Grass-Fed Whey Protein (Unflavored)	7.9	8.6	7.4	7.8	7.3	8.0	Powder

Deciding between two?

Our head-to-head comparisons put the top picks side by side.

Whey+ Grass-Fed Whey Protein Isolate vs 100% Grass-Fed Whey Protein Isolate Clear Whey Isolate vs 100% Grass-Fed Whey Protein Isolate Whey Protein vs 100% Grass-Fed Whey Protein Isolate Whey+ Grass-Fed Whey Protein Isolate vs Clear Whey Isolate Whey Protein vs Whey+ Grass-Fed Whey Protein Isolate Whey Protein vs Clear Whey Isolate

FAQ

How much protein do I need per day?

The RDA for healthy adults is 0.8 g per kilogram of body weight, but research on exercising people supports more. The International Society of Sports Nutrition recommends 1.4 to 2.0 g/kg/day for most people who train, and the NIH Office of Dietary Supplements notes that athletes may need 1.2 to 2.0 g/kg. A 2018 meta-analysis found that muscle gains from supplementation leveled off at around 1.6 g/kg/day.

Do I need protein powder to build muscle?

No. Meat, fish, eggs, dairy, beans and soy can supply everything you need. Powder is simply a convenient, low-calorie way to reach your daily target, particularly after workouts, while traveling or on a plant-based diet. Research suggests supplementation helps most when it raises total intake toward about 1.6 g/kg/day; beyond that, extra protein adds little for muscle growth.

When is the best time to take protein powder?

Total daily intake matters most. The ISSN suggests spreading 20 to 40 g doses every three to four hours, and the NIH Office of Dietary Supplements notes that high-quality protein within about two hours after exercise appears optimal, although a meta-analysis found that taking it within an hour of training did not significantly change strength or size. A 30 to 40 g serving of casein before bed can raise overnight muscle protein synthesis.

Is whey or plant protein better?

Whey is a complete, fast-digesting protein that is naturally rich in leucine, which is why it is the most studied option for muscle building. Plant proteins can work well too, but single sources may be low in certain essential amino acids (rice protein in isoleucine, for example), so blends such as pea with rice or pumpkin seed are preferable. A somewhat larger serving helps plant blends match whey's leucine content.

Are protein powders safe?

For healthy adults, the NIH Office of Dietary Supplements reports that high-protein diets providing two to three times the RDA do not appear to harm kidney function, bone health or hydration. The more practical risks are contamination and inaccurate labels, so choose third-party certified products and be mindful of heavy metals in plant-based powders. Talk to a clinician first if you have kidney disease, are pregnant or take prescription medication.

Explore every protein powder product we’ve scored